I.C.S. Vortex
Truly no unknown metal musician is the Norwegian Simen Hestnæs aka I.C.S. Vortex. Best known for his memberships at Borknagar, Arcturus and Dimmu Borgir, he has started a successful solo project some time ago.

His first solo album Storm Seeker was released in 2011 and can be best described as progressive metal. But in fact you can find elements from all of his creative periods on the album.